fix prettier error for unknown file types in writeIfChanged

[MoSattler]

Description:

This PR addresses an issue where running Prettier on created svg files throws an error. The issue is caused by Prettier not recognizing the .svg file format by default.

Steps to Reproduce:

1. Create a new epic-stack project.
2. Observe the error when the writeIfChanged function attempts to run Prettier on the sprite.svg file.
3. With the changes in this PR, the error should no longer occur.

Changes:

• Added the --ignore-unknown flag to the prettier --write command in the writeIfChanged function. This ensures that Prettier will gracefully ignore file types it does not recognize, rather than throwing an error.

async function writeIfChanged(filepath: string, newContent: string) {
	const currentContent = await fsExtra
		.readFile(filepath, 'utf8')
		.catch(() => '')
	if (currentContent === newContent) return false
	await fsExtra.writeFile(filepath, newContent, 'utf8')
-       await $`prettier --write ${filepath}`
+       await $`prettier --write ${filepath} --ignore-unknown`
	return true
}

Relevant Documentation:

Prettier's --ignore-unknown flag is used to ignore unknown files matched by patterns.

Fixes:

• https://github.com/epicweb-dev/epic-stack/issues#issuecomment-1702007326

Thank you @sergio-codel-io for reporting the issue

[kentcdodds]

Thanks!